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{
$Id: video.pp,v 1.5 2004/10/03 20:16:43 armin Exp $
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by Florian Klaempfl
member of the Free Pascal development team
Video unit for netware
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
{ 2001/04/16 armin: first version for netware
2002/02/26 armin: changes for current fpc }
unit Video;
interface
{$i videoh.inc}
implementation
uses
dos;
{$i video.inc}
{$i nwsys.inc}
var
MaxVideoBufSize : DWord;
VideoBufAllocated: boolean;
procedure SysInitVideo;
VAR height,width : WORD;
startline, endline : BYTE;
begin
DoneVideo;
ScreenColor:= (_IsColorMonitor <> 0);
_GetSizeOfScreen (height, width);
ScreenWidth := width;
ScreenHeight:= height;
{ TDrawBuffer only has FVMaxWidth elements
larger values lead to crashes }
if ScreenWidth> FVMaxWidth then
ScreenWidth:=FVMaxWidth;
CursorX := _wherex;
CursorY := _wherey;
_GetCursorShape (startline,endline);
{if not ConsoleCursorInfo.bvisible then
CursorLines:=0
else
CursorLines:=ConsoleCursorInfo.dwSize;}
{ allocate back buffer }
MaxVideoBufSize:= ScreenWidth * ScreenHeight * 2;
VideoBufSize := ScreenWidth * ScreenHeight * 2;
LockUpdateScreen := 0;
end;
procedure SysDoneVideo;
begin
SetCursorType(crUnderLine);
end;
function SysGetCapabilities: Word;
begin
SysGetCapabilities:=cpColor or cpChangeCursor;
end;
procedure SysSetCursorPos(NewCursorX, NewCursorY: Word);
begin
_GotoXY (NewCursorX, NewCursorY);
end;
function SysGetCursorType: Word;
var startline, endline : byte;
begin
_GetCursorShape (startline, endline);
CASE startline of
1 : SysGetCursorType := crBlock;
5 : SysGetCursorType := crHalfBlock
ELSE
SysGetCursorType := crUnderline;
END;
{crHidden ?}
end;
procedure SysSetCursorType(NewType: Word);
begin
if newType=crHidden then
_HideInputCursor
else
begin
case NewType of
crUnderline:
_SetCursorShape (9,$A);
crHalfBlock:
_SetCursorShape (5,$A);
crBlock:
_SetCursorShape (1,$A);
end;
_DisplayInputCursor;
end;
end;
{procedure ClearScreen;
begin
FillWord(VideoBuf^,VideoBufSize div 2,$0720);
UpdateScreen(true);
end;}
procedure SysUpdateScreen(Force: Boolean);
begin
if VideoBuf = nil then exit;
if (LockUpdateScreen<>0) or (VideoBufSize = 0) then
exit;
if not force then
begin
asm
pushl %esi
pushl %edi
movl VideoBuf,%esi
movl OldVideoBuf,%edi
movl VideoBufSize,%ecx
shrl $2,%ecx
repe
cmpsl
setne force
popl %edi
popl %esi
end;
end;
if Force then
_CopyToScreenMemory (ScreenHeight, ScreenWidth, VideoBuf, 0, 0);
end;
Const
SysVideoModeCount = 1;
SysVMD : Array[0..SysVideoModeCount-1] of TVideoMode = (
(Col: 80; Row : 25; Color : True));
Function SysSetVideoMode (Const Mode : TVideoMode) : Boolean;
begin
SysSetVideoMode := ((Mode.Col = 80) AND (Mode.Row = 25) AND (Mode.Color));
end;
Function SysGetVideoModeData (Index : Word; Var Data : TVideoMode) : boolean;
begin
SysGetVideoModeData:=(Index<=SysVideoModeCount);
If SysGetVideoModeData then
Data:=SysVMD[Index];
end;
Function SysGetVideoModeCount : Word;
begin
SysGetVideoModeCount:=SysVideoModeCount;
end;
Const
SysVideoDriver : TVideoDriver = (
InitDriver : @SysInitVideo;
DoneDriver : @SysDoneVideo;
UpdateScreen : @SysUpdateScreen;
ClearScreen : Nil;
SetVideoMode : @SysSetVideoMode;
GetVideoModeCount : @SysGetVideoModeCount;
GetVideoModeData : @SysGetVideoModedata;
SetCursorPos : @SysSetCursorPos;
GetCursorType : @SysGetCursorType;
SetCursorType : @SysSetCursorType;
GetCapabilities : @SysGetCapabilities
);
initialization
VideoBufAllocated := false;
VideoBufSize := 0;
VideoBuf := nil;
SetVideoDriver (SysVideoDriver);
end.
|
